<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .a {
            /* width: 200px; */
            height: 200px;
            background-color: #f00;
            transition: 1s;
            /* margin: 100px; */
            text-align: center;
            line-height: 200px;

            transform: scale(.9);

            transform-origin: 0 center;

            font-size: .24rem;
        }

        .a:hover {
            /* transform: rotate(300deg); */
        }
    </style>
</head>

<body>

    <!-- 
        transform-origin:改变旋转或者缩放的中心点位置的
     -->

    <div class="a">3333</div>

    11111111111111111

</body>

</html>